Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 17.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 10/17/2025   07:10:34   (  70.10,  68.67) 10/17/2025   07:11:01  (  70.08,  68.73)    2.96                27
 10/17/2025   08:01:14   ( -69.94,-123.77) 10/17/2025   08:00:31  ( -69.97,-123.80)    2.89                43
 10/19/2025   22:36:47   ( -70.55,  16.44) 10/19/2025   22:37:57  ( -70.46,  17.51)   40.99                70
 10/19/2025   23:27:24   (  70.04,-175.45) 10/19/2025   23:27:30  (  70.02,-175.47)    1.96                 6
 10/20/2025   00:18:05   ( -69.93,  -7.97) 10/20/2025   00:17:00  ( -69.91,  -8.00)    2.58                65
 10/22/2025   14:53:30   ( -70.13, 132.90) 10/22/2025   14:54:30  ( -70.15, 132.95)    3.28                60
 10/22/2025   15:44:14   (  69.99, -59.58) 10/22/2025   15:43:58  (  69.99, -59.63)    2.05                16
 10/22/2025   16:34:46   ( -69.40, 108.60) 10/22/2025   16:33:36  ( -69.44, 107.25)   53.21                70
 10/25/2025   07:10:19   ( -70.08,-111.24) 10/25/2025   07:10:57  ( -70.09,-111.24)    0.89                38
 10/25/2025   08:01:04   (  70.00,  56.20) 10/25/2025   08:00:24  (  69.98,  56.24)    2.85                40
 10/27/2025   22:36:37   (  70.64,-163.64) 10/27/2025   22:37:47  (  70.54,-162.33)   49.90                70
 10/27/2025   23:27:09   ( -70.05,   4.61) 10/27/2025   23:27:24  ( -70.05,   4.60)    1.10                15
 10/28/2025   00:17:53   (  69.91, 172.12) 10/28/2025   00:16:51  (  69.94, 172.08)    3.23                62
 10/30/2025   14:53:18   (  70.14, -47.07) 10/30/2025   14:54:20  (  70.15, -47.01)    2.04                62
 10/30/2025   15:43:59   ( -70.02, 120.45) 10/30/2025   15:43:50  ( -70.04, 120.47)    3.05                 9
 10/30/2025   16:34:35   (  69.46, -71.43) 10/30/2025   16:33:25  (  69.48, -72.65)   47.62                70